Cleaning mechanism for saw-gins.



r J. G. DIGKSON. CLEANING MECHANISM FOR SAW GINS. APPLICATION n mm mm:a, 1909.

1,010,731 Patented Dec. 5,1911. I

' UNITED STATES: A

nuns e. DICKSON, or LITTLE-noon, ARKANsAs, Assrenoa' ro DixNmanuraorunme column, or GREENWOOD, mrssrssrrrr, A conrona'rronor WESTVIRGINIA.

CLEANING mncmrsrf FOR saw-ems.

To all whom it may concern:

- Be it known that I,JAMES GQDICKSON, a

Little Rock, county of Pulaski, and State of Arkansas, have inventedcertain new and useful Improvements in Cleaning Mechanism for.Saw-Grins; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it fappertainsto make and use the same.

This invention relates to cleaning mechanism for saw-gins and isintended as an improvement in the mechanism for the same purpose whichis described in Letters Patent No. 897 ,883, granted to me on September8, 1908. The novel features of the invention will appear clearly fromthe following description and claims.

The accompanying drawing illustrates in vertical section a portion of asaw-gin to which the invention is applied.

Referring to the drawing, (1 denotes one of the gin saws, and b one ofthe gin ribs, said rib being formed by slotting the breast plate in theusual manner to permit the movement of the sawtherethrough. The

breast plate is secured to the frame of the ginin any convenient manner,such as that illustrated.

Adjacent to the upper rear portion of the saw is located a trash duct 41which leads in oblique-direction radially of the saw and away from itsperiphery, said duct delivering into a transverse trash flue h. The fineh and the trash duct d extend throughout the width of the gin, that isto say, they cooperate with all of the saws of the battery, and thecommunication between the trash duct and flue is effected by means of aconstricted opening or neck portion 6 formed at the lower part of thetrash flue, which is preferably of circular cross section asillustrated. The trash duct (1 is wider at its lower end where itcommunicates with an open space or trash bhamber 7' located just behindthe breast plate and at theupper portion of the saw.

Extending parallel to the trash duct (1 is an air duct 9, locatedimmediately beneath the trash duct and decreasing in cross sec-4Specification of Letters Patent. Application filed June 8, 1909. SerialNo. 500,843.

Patented Dec. 5, 191 1.

sharp reverse bend or hooked portion 9 that.

debouches 1nto the lower enlarged end of the trash duct. This curvedoutlet or nozzle of the air duct'is of reduced cross section as comparedto the main part of-the air duct and serves to direct the air which isforced or sucked in downward direction through the air duct upward intothe trash duct,

whence such air passes into the -flue h.

\Vhen the teeth of the saw pass through the gin ribs into the space 1,the lint which adheres to them carries a certain amount of motes, dust,and other trash, and this is removed from the lint and conducted to theair blast by. means of a device 2' of appropriate character which may,if desired, comprise astripping finger extending along the saw face'to acertain extent, as shown. This stripping finger may be omitted in somein-.

stances, in which event the centrifugal force induced by the rotation ofthe saw is relied upon to throw off the trash from the saw teeth, but inany case the device 5 guides the liberated trash to the air blast, atthe point where said blast is emitted from the outlet or nozzle g, sothat such trash is carried to the trash duct and thence out of themaside both faces of the saws, as will be understood, and it will beobvious that the trash in dropping off of the lower ends of thesefingers will fall directly into the air blast which is directed alongthe finger ends.

The important features of the invention are the reverse bending of theair duct so that there is obtained an upwardly directed nozzle .ofrelatively small area discharging the air into the trash duct at thelower end of the latter, and also the provision of the means by whichthe foreign matters are effectively removed from the saw teeth andconducted to theair blast, through the interinediary of which they areremoved from the gin. The particular relation of the air duct and trashduct is especially advantageous in obtaining a strong upward draft whichwill effectively carry away all of the trash, and this result isobtained by a compact and simple arrangement. The improved constructionis adapted for use with both brush and air blast gins, and may,ofcourse, be operated either'by the injection of air into the air ductor by suction In the latter case, the suction is preferably eifectedfrom chine. In case stripping fingers of the kind illustrated are used,they are located alongthe trash flue, which can be connected with asuction pump in any convenient manner.

It is to be noted that owing to the fact that the trash duct enters thetrash flue at the bottom of the latter, and in a substantiallytangential direction, the trash will move in a spiral course as itpasses outward through the trash flue, thus preventing obstruction ofthe flue by the settling of the foreign matters therein. In other words,after each substantially circular movement of the body of trash in thetrash flue, during the outward passage of the trash, the alr from thetrash duct strikes such body and tends to hold it in the center of theflue.

Without limiting myself to the precise construction shown, I claim 1. Incleaning mechanism for saw gins,

. the combination of a saw, means to direct a blast of air in proximityto but out of contact with the peripher ofthe saw, and means to guide tothe air blast the trash thrown ofi from the saw.

2. In a saw gin, the combination w1th the saws, of a trash flue at therear of the same, a trash chamber in advance of sald flue and into whichthe trash is thrown fromthe saw teeth by centrifugal .force, and a ductconnecting said chamber with said trash flue and into which a blast ofair is discharged, said blast of air being out of contact with the saws.

3. In cleaning mechanism for saw-gins, a trash duct to conduct the trashaway from the periphery of the saw, an air duct parallel with the trashduct and having a sharp reverse bend by which the air is discharged intothe lower end of the trash duct, and means to ide the trash from the sawteeth into the bfii st in the trash duct.

4. In cleanin mechanism for saw-gins, a trash duct to lead the trashupward and away from the periphery of the saw, an air duct directing theair downward and toward the periphery of the saw and having a reverselycurved discharge bend through which the air is discharged into the lowerend of the trash duct, and a stripping device to stri the trash from thesaw-teeth and deflect 1t into the trash duct.

5. In cleaning mechanism for saw-gins, a trash duct to conduct the trashupward and away from the periphery of the saw, a downwardly extendingair duct parallel to the trash duct and having at its lower end, whichcommunicates with such trash duct, a reverse bend of reduced crosssection by means of which the air is turned in its course and directedupwardlythrough the trash duct, and means to guide the trash (firom thesaw-teeth into the blast in the trash uct.

6. In cleaning mechanism for saw-gins, a trash duct extending radiallywith respect to the saw at the upper rear portion of the latter, an airduct beneath the trash duct and parallel thereto, said air duct leadlngthe air in downward direction toward the periphery of the saw, a sharplycurved noz-' entrain the trash, and means to guide the trash from thesaw-teeth into the trash duct adjacent said nozzle.

7. In cleaning mechanism for saw-gins, the combination of a saw, meansto direct a blast of air away from the peripher of the saw, and means tostrip the trash rom the saw-teeth and guide it to such air blast.

8. In cleaning mechanism for saw-gins, the combination of a saw, a trashduct leading away from the periphery of the saw, means to direct a blastof air into said trash duct, the saw teeth being out of the air blast,and a stripping device to guide the trash fromthe saw teeth into the airblast.

9. In cleaning mechanism for saw-gins, the combination of a saw, astripping finger located along the edge of the saw, and along which thetrash is guided, and means to direct a blast of air in proximity to theend of said stripping finger from which the trash drops ofl' in order toremove such trash, the saw teeth and the main part of said strippingfinger being out of the air blast.

10. In cleaning mechanism for saw-gins, the combination of a saw, atrash duct leading away from the periphery of the saw, an air ductcommunicating with the inlet end of the trash duct, and a strippingdevice coacting with the saw and guiding the trash from the saw into theair blast at the junction of said ducts.

11. In cleaning mechanism for saw-gins, the combination of a saw, atrash duct to conduct the trash away from the periphery of the saw, anair duct substantially parallel with the trash duct and communicatingtherewith at the lower end of the trash duct, the lower end of the airduct being curved reversely in order to turn back the air blast andcause it to enter the trash duct, and a stripping device which stripsthe trash from the saw teeth and guides it to the point where the air isdischarged from the air duct.

12. In cleaning mechanism for saw gins, a saw, means to direct a blastof air in proximity to the saw but out of actual contact therewith, andmeans to strip the trash from the saw teeth and guide it to such airblast-.-

13. In cleaning mechanism for saw gins, a saw, means to direct a blastof air in proximity to the saw teeth but out of actual contacttherewith, and a relatively fixed stripping finger to strip the trashfrom the saw teeth and guide it to such air blast.

14. In a cotton gin, a gin saw, a dust chamber adjoining the upperportion of the saw, a discharge chute leading from the bottom of thechamber and inclining upwardly and outwardly, and. an air-blast passagedirected into the mouth of the discharge chute at the bottom of the saidchamber, and curving around the lower end of the lower wall of thechute, said saw arranged out of the path of the said passage.

15. In a cotton gin, a gin saw, a dust chamber adjoining the upperportion of the saw, a chute leading from the lower portion ofthe-chamber, a whipping board cooperating with the saw, and a nozzle todirect a blast of air into the chute, directed thereto between the lowerwall thereof and the whipping board.

In testimony whereof I aflix my signature, in presence 01? twowitnesses. JAMES G.

Witnesses:

R. M. S. BU'TNER, A. W. JOHNSON.

meKsoN.

